* {
    margin: 0;
    padding: 0;
}

ul,
li,
ol {
    list-style: none;
}

a,
a:hover,
a:visited,
a:link,
a:active {
    text-decoration: none;
    color: #333;
}

.clearFix::after,
.clearFix::before {
    content: '';
    display: block;
    clear: both;
}

div.banner {
    width: 600px;
    height: 400px;
    border: 3px solid #333;
    margin: 30px auto;
    position: relative;

    overflow: hidden;
}

.banner>ul {
    width: 500%;
    height: 100%;
    background-color: pink;

    position: absolute;
    top: 0;
    left: 0;
}

.banner>ul>li {
    width: 600px;
    height: 100%;
    float: left;

    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    font-size: 100px;
}

.banner>ol {
    width: 50%;
    height: 20px;
    position: absolute;
    background-color: rgba(0, 0, 0, .4);
    border-radius: 10px;

    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);

    display: flex;
    justify-content: space-evenly;
    align-items: center;
}

.banner>ol>li {
    width: 10px;
    height: 10px;
    background-color: #fff;
    border-radius: 50%;
    cursor: pointer;
}

.banner>ol>li.active {
    background-color: skyblue;
}

.banner>div {
    width: 100%;
    height: 40px;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.banner>div>a {
    width: 20px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    background-color: rgba(0, 0, 0, .4);
}